问题

It is hard to say what kind of person he is.Sometimes he is very friendly; at other times he ___ be very cold.
A:can
B:must
C:will
D:shall
B:must
C:will
D:shall
正确答案是:
同类题型
Communication along with information industry __ an important part in modern times
use me, ______ can you tell me the way to the train station—Sorry, I am a stranger here myself
Tom was absent from school today. We guess he.
-When shall we meet again, next Wednesday or Friday-____________day is OK. It’s not a problem to me.